Samuel hatt



(No Model.)

S. HAT-T. BRAKE SHOE.

No. 411,861 Patented Oct. 1, 1889.

UNITED STATES ATENT' FFICE.

SAMUEL HATT, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR TO GEORGE SANDERSON,OF SAME PLACE.

BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 411,861, dated October1, 1889. Application filed July 26, 1388. Serial No. 281,105. (Nomodel.)

To [LZZ whom, it may concern:

Be it known that I, SAMUEL HATT, a subject of the Queen of GreatBritain, residing at the city of Montreal, in the district of Montrealand Province of Quebec, Canada, have invented new and usefulImprovements in Brake-Shoes; and I do hereby declare that the followingis a full, clear, and exact description of the same.

My invention relates to an improved construction in brake-shoes, chieflyused for the Wheels of railway-cars, formed partly of hard or chilledmetal and partly of soft metal, the soft portion giving the shoe a goodhold upon the wheel, and the hard portion causing the shoe to Wear muchlonger than if of soft metal throughout. I

The object of my present invention is to save considerable trouble inthe molding of the shoe and give at the same time a very desirablespecies of shoe.

In the drawings hereunto annexed similar letters of reference indicatelike parts, and Figure l is a side elevation of a brake-shoe embodyingmy invention. Fig. 2 is a face View of the brake-shoe shown in Fig. 1.Fig. 3 is a transverse section on line a, 2, on a larger scale,delineating therewith a manner of molding the shoe.

In this case the shoe is cast-all in one piece in a mold constructed togive it the desired configuration and dimensions. This mold is formedwith its part A of ordinary molding sand for casting ordinary softmetal, andnot only is the face I) of the shoe cast against or upon this,.but it also extends any desired distance up the sides and ends of theshoe, as shown at (J.

D is the continuation of the mold, arranged in any of the ordinarymanners to cause a chilled or hard marginal part E on the outer portionof the shoe, as shown part-1y divided by the dotted lines m. This is soarranged that the shoe when cast will have a hard marginal part E and asoft central part 1 It is desirable that the hard portion E shall notcome in contact with the Wheel until the shoe has become Worn to theshape of the wheel. Therefore the chilled or hard part E may not, whenthe shoe is cast, extend to the face, but only relatively to about thedotted line y in Fig. 1, This will be also understood by the manner inwhich the section of theshoe shown in Fig. 3 is scction-lined.

G is any desired cover to the mold, and H is any desiredprojectionformed on the back of the shoe by which it may be attached to anyordinary brake-head; or this maybe done in any other ordinary Waydesired, as at present in use.

\Vha t I claim is as follows:

As an improved article of manufacture, a brake-shoe, substantially asdescribed, havinga marginal portion of chilled metal formed on its sidesand arranged, as described, so that there will be a uniform relativeproportion of chilled and soft metal throughout the planes of its wearfrom front to back, the Whole substantially as described.

SAMUEL HATT.

\Vitncsses:

G. Dorms, CHARLES G. G. SIMPSON.

